UGG Women's Klarissa Shearling Boots Sheepskin Waterproof suede upper features a waterproof and windproof eVent membrane that "vents" moisture from inside the shoe for a durably waterproof boot. eVent Fabric: Through Direct Venting proprietary and patented technology, millions of tiny pores are able to breathe at their full potential, allowing sweat to vent directly to the outside of the fabric in one easy step. Pull-on design for quick and easy on and off. Fully lined in plush sheepskin with a removable sheepskin footbed. Shaft: 11 34 in